<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>计算5的阶乘</title>
	</head>
	<body>
		<script>
			function x(n) {
				if(n === 1) {
					return 1;
				} else {
					return n * x(n - 1);
				}
			}
			//1*2*3*4*5
			console.log(x(5));
		</script>
	</body>
</html>
